Asteroids

476601 2008SE85 help

Last update: 2025-09-10 00:30 UTC

Orbital Properties

Epoch

61000.0

MJD

Orbit type

Apollo

Perihelion (q)

0.772

Aphelion (Q)

2.479

Eccentricity (e)

0.525

Inclination (i)

29.6

deg

Orbit period (P)

757.1

Earth MOID

0.02577

U parameter

0.6

Next Earth close approach

Date

2069-03-14

Nominal distance (from Earth center)

0.087

13015278

Maximum Brightness

mag

Risk

Object is not in risk list

Physical Properties

Absolute Magnitude (H)

19.7

mag

Diameter

300 - 700*

Taxonomic type

Rotation period (T)

Discovery Information

Discovery Date

2008-09-28

Observatory

Catalina Sky Survey

ORBIT VISUALISATION TOOLS

External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

61000.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

1.625624

1-sigma variation

1.801E-8

Unit

Eccentricity (e)

Value

0.525150

1-sigma variation

8.149E-8

Unit

Inclination (i)

Value

29.6116

1-sigma variation

2.771E-5

Unit

Long. of Ascending Node (Ω)

Value

177.4147

1-sigma variation

1.478E-5

Unit

Arg. of Perihelion (ω)

Value

294.9070

1-sigma variation

1.865E-5

Unit

Mean Anomaly (M)

Value

59.19942

1-sigma variation

0.00004

Unit

Perihelion distance

Value

0.771927

1-sigma variation

Unit

Aphelion distance

Value

2.479320

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.032328

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.506886

1-sigma variation

Unit

MOID

Value

0.025773

1-sigma variation

Unit

Orbit Period

Value

757.0567

1-sigma variation

Unit

U parameter

Value

0.6

1-sigma variation

Unit

Covariance Matrix

	a	e	i	Ω	ω	M
a	3.24484E-16	1.34593E-15	-1.27859E-13	3.56474E-14	-1.59186E-13	-6.65827E-13
e	1.34593E-15	6.64115E-15	-6.81944E-13	1.29420E-13	-5.31483E-13	-2.84583E-12
i	-1.27859E-13	-6.81944E-13	7.67673E-10	2.20601E-10	-1.20311E-10	2.65174E-10
Ω	3.56474E-14	1.29420E-13	2.20601E-10	2.18354E-10	-1.85936E-10	-7.94043E-11
ω	-1.59186E-13	-5.31483E-13	-1.20311E-10	-1.85936E-10	3.47657E-10	2.81798E-10
M	-6.65827E-13	-2.84583E-12	2.65174E-10	-7.94043E-11	2.81798E-10	1.38645E-9

Date of computation: 2025-09-10 00:30 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

Unit

Source

[-]

Quality

Value

Unit

Source

[-]

Amplitude

Value

Unit

mag

Source

[-]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[-]

Taxonomy (all)

Value

Unit

Source

[-]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

19.726

Unit

mag

Source

[1]

Slope Parameter (G)

Value

0.15**

Unit

mag

Source

[1]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[2]

Diameter

Value

300 - 700*

Unit

Source

[2]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

Unit

mag

Source

[-]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[3]

Download this part as:

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	Estimation	Estimated from absolute magnitude
[3]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

2893

Unit

Source

[1]

Unobserved

Value

3354

Unit

Source

[1]

Normalized RMS of residuals

Value

0.472744

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

2008-09-28.44782

Unit

Source

[2]

Last Observation

Value

2016-08-30.14304

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

127 (1)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

2013-03-19

Unit

Source

[3]

Last Observation

Value

2013-03-19

Unit

Source

[3]

Delay (Discarded)

Value

1 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

1 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

2 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA Aegis	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close Approaches for 476601 2008SE85 from 1950 to 2125

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possible distance in au	Distance uncert. in au
EARTH	1955-03-26 08:06	< 1 min	0.1119299	0.1119175	0.0000041
EARTH	1984-03-20 21:32	< 1 min	0.0341740	0.0341678	0.0000021
EARTH	2013-03-25 03:50	< 1 s	0.1018047	0.1018045	0.0000001
EARTH	2069-03-14 14:29	< 1 min	0.0870018	0.0869885	0.0000044
EARTH	2098-03-18 02:28	< 1 min	0.0384640	0.0384588	0.0000017

Download as:

Stationary Points

Ecc. an. ast.	Ecc. an. Earth	Distance in au	Classification
40.46510523	75.81751333	0.02509949	MINIMUM
302.57101350	278.93577007	0.28891066	MINIMUM
346.79827060	347.17402172	0.48985738	SADDLE
174.40033988	189.93704234	1.63993565	SADDLE
355.74590474	184.76357993	1.73775130	SADDLE
183.13100638	15.28718032	3.38895041	MAXIMUM

Download:

MOID Plots

Click on the images to zoom-in and zoom-out